SOFIA SO-1 PLUSH MATTRESS - 10 YR WARRANTY It s one of the mattresses that has a great medium feel to it. The Plush is double-sided and uses a 416 tempered spring unit with 13 gauge coils. It s comfort foam found on both sides provides a gentle feel making it incredibly comfortable. Double-Sided Plush 1.75in Super Soft Quilt FR Fabric 10 Year Warranty